Instrumentation Calculators
Practical calculators for instrumentation, control and electrical engineers. Each tool is based on the relevant standard and shows the formula, a worked example and the steps behind every answer.
Calculator Categories
Temperature Measurement
Thermocouples, RTDs, thermistors, heat transfer, humidity and sensor response.
15 liveInstrumentation Signal
Analog signal scaling, square root extraction and loop design.
4 livePLC Digital Signal
Raw count scaling, ADC resolution and number formats for PLC work.
3 liveFlow Measurement
DP meters, open channel flow, gas conversions, pressure drop and meter sizing.
19 liveLevel Measurement
DP, radar, ultrasonic and displacer level, plus tank volume for every shape.
12 livePressure Measurement
Gauges, transmitters, remote seals, piping design, water hammer and compressed air.
13 liveControl Valve
Cv sizing, authority, cavitation, actuator thrust, leakage and split range.
12 liveCalibration
Calibration error, uncertainty, hysteresis, linearity, guard bands and TUR.
10 liveSafety and SIL
Functional safety, reliability and hazardous area calculations.
7 liveAnalytical
pH, conductivity, dissolved oxygen, humidity and solution chemistry.
8 liveElectrical
Power, cables and protection, motors, transformers, circuits, backup power, lighting and earthing.
37 liveUnit Converters
76 converters for pressure, flow, temperature, electrical and more.
76 liveNewest Calculators New
Frequently Asked Questions
Are these instrumentation calculators free?
Yes. Every calculator is free to use, works on mobile and desktop, and needs no download or sign up.
How accurate are the calculators?
Each tool is built on the published standard for its topic, such as NIST ITS-90 for thermocouples and IEC 60751 for RTDs, and shows the formula so you can check every step.
How often are new calculators added?
New categories are released regularly. New tools appear on their category page and in the Newest Calculators list.